[FIR JS] Add more tests for JS_NAME_CLASH and JS_FAKE_NAME_CLASH

^KT-59425 Related
^KT-59370 Related

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsBoxTestGenerated.java

@@ -5178,6 +5178,12 @@ public class FirJsBoxTestGenerated extends AbstractFirJsBoxTest {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsES6BoxTestGenerated.java

@@ -5284,6 +5284,12 @@ public class FirJsES6BoxTestGenerated extends AbstractFirJsES6BoxTest {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirPsiJsOldFrontendDiagnosticsTestGenerated.java

@@ -698,12 +698,30 @@ public class FirPsiJsOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiJ
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classAndTypealias.kt");
         }
 
+        @Test
+        @TestMetadata("classInheritance.kt")
+        public void testClassInheritance() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritance.kt");
+        }
+
+        @Test
+        @TestMetadata("classInheritanceExtensions.kt")
+        public void testClassInheritanceExtensions() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritanceExtensions.kt");
+        }
+
         @Test
         @TestMetadata("classLevelMethodAndProperty.kt")
         public void testClassLevelMethodAndProperty() throws Exception {
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classLevelMethodAndProperty.kt");
         }
 
+        @Test
+        @TestMetadata("classMembers.kt")
+        public void testClassMembers() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classMembers.kt");
+        }
+
         @Test
         @TestMetadata("conflictingNamesFromSuperclass.kt")
         public void testConflictingNamesFromSuperclass() throws Exception {
@@ -722,6 +740,18 @@ public class FirPsiJsOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiJ
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethod.kt");
         }
 
+        @Test
+        @TestMetadata("extensionPropertyAndMethodWithJsName.kt")
+        public void testExtensionPropertyAndMethodWithJsName() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethodWithJsName.kt");
+        }
+
+        @Test
+        @TestMetadata("externalClassInheritance.kt")
+        public void testExternalClassInheritance() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/externalClassInheritance.kt");
+        }
+
         @Test
         @TestMetadata("illegalName.kt")
         public void testIllegalName() throws Exception {
@@ -854,6 +884,12 @@ public class FirPsiJsOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiJ
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/propertyAndMethodInSubclass.kt");
         }
 
+        @Test
+        @TestMetadata("topLevelDeclarations.kt")
+        public void testTopLevelDeclarations() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/topLevelDeclarations.kt");
+        }
+
         @Test
         @TestMetadata("topLevelMethodAndJsNameConstructor.kt")
         public void testTopLevelMethodAndJsNameConstructor() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrBoxJsES6TestGenerated.java

@@ -5284,6 +5284,12 @@ public class IrBoxJsES6TestGenerated extends AbstractIrBoxJsES6Test {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrBoxJsTestGenerated.java

@@ -5178,6 +5178,12 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt

@@ -0,0 +1,17 @@
+open class Class {
+    fun String.test(): String = "O"
+    val String.test: String
+        get() = "K"
+}
+
+// This case is only relevant for the JS Legacy BE and is not applicable to the JS IR backend,
+// as the IR BE can resolve such name collisions.
+@Suppress("JS_FAKE_NAME_CLASH")
+class MyClass1 : Class()
+
+fun box(): String {
+    val s = ""
+    return with(MyClass1()) {
+        s.test() + s.test
+    }
+}